APA aipamena

LEvy, M. (2008). VOLCANOES AND EARTQUAKES. Britannica.

Chicago Style aipamena

LEvy, Michael. VOLCANOES AND EARTQUAKES. Britannica, 2008.

MLA aipamena

LEvy, Michael. VOLCANOES AND EARTQUAKES. Britannica, 2008.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.